I managed to get it on my Approach 40 but it's not the best substitute for it. The communication isn't the same as the original Garmin strap.
๐ถ๏ธ Bose Frames Tempo - Polarized Sports Audio Sunglasses with Bluetooth Connectivity in Black
7 Review
๐ถ๏ธ GELETE Bluetooth Sunglasses: Music, Calls & Polarized Lenses for Men & Women
3 Review
๐น๏ธ HTC Vive Tracker 3 Pack (2018) for Virtual Reality Headset
3 Review
Polarized Bluetooth Audio Sunglasses - Flows: Open-Ear Speakers, Extended Battery Life, UVA & UVB Protection, Smart Glasses for Men & Women โ Bruno Style (Matte Black)
6 Review